unable to access Socket class in java in client and server for arp

[ramon_et]

i am working on a client and server program for arp in java which uses Socket.When a compile it i get error like this the code looks like this..stack overflow is asking me more details about my code but i dont have mare details about this code am sorry anyone pls help me thanks in advance.\[code\]import java.io.*;import java.net.*;import java.net.Socket.*;class arpserver{public static void main(String args[])throws IOException{try{ServerSocket soc = new ServerSocket(2500);System.out.println("Server started");Socket client = null;client = soc.accept();String str;PrintStream ps = new PrintStream(client.getOutputStream());BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream()));Runtime r = Runtime.getRuntime();Process p = r.exec("ifconfig eth0");BufferedReader pin=new BufferedReader(new InputStreamReader(p.getInputStream()));String haddr = "";String ipaddr = br.readLine();int flag = 0;while((str = pin.readLine())!=null){System.out.println(str);if((str.indexOf("HWaddr")) != -1){int tlen = str.length();int hlen = tlen - 19;haddr = str.substring(hlen,tlen);}else if ((str.indexOf(ipaddr)) != -1){flag = 1;}}if (flag == 1)ps.println(haddr);ps.close();br.close();pin.close();client.close();soc.close();}catch(IOException io){System.err.println("Exception : " + io.toString());}}}\[/code\]during compilation i get this error \[code\]S:\>javac arpserver.javaarpserver.java:12: cannot access Socketbad class file: .\Socket.javafile does not contain class SocketPlease remove or make sure it appears in the correct subdirectory of the classpath.Socket client = null;^1 error\[/code\]